If you can't learn the changes in nature? Then don't learn it! If you have the ultimate chakra control ability, what kind of changes in nature are needed? Create more attributeless ninjutsu. Self-developed six styles. Develop the immortal model belonging to the human race... Chiba said that this thing is not better than ninjutsu? If you think "Koba: Can't learn ninjutsu, you have to develop it yourself" is not bad, please don't forget to recommend it to your friends in QQ group and Weibo!